For a short time now, Safari has been showing blank pages on certain sites, most notably my OWN sites. This was extremely irritating. I am not certain if it is related to the recent security and Java updates, since I installed them several weeks ago, and this has only been happening for a week or so now.

I believe I fixed the problem for good by deleting all cookies.

There is a lot of discussion about the matter on MacNN:
GoDaddy services unavailable to Safari users and the Apple Support forums:
Topic: Page not viewable in Safari and
Safari weirdness with versiontracker.com